The idea that boycotting is not participating in society could not be more perversely incorrect. Boycotting prioritizes society above yourself. Neglecting to boycott is the selfish act of putting your own personal benefit above all else and abandoning one of the few tools we have to improve things while feeding harms of society. Both kinds of consumption are “participation” but if you choose to feed the baddies then your participation is detrimental.
It’s really perverse to refer to boycotters as non-participants when they are actively taking on the burden of informing themselves of who the bad players are, tracking supply chains to brands, and sacrificing selfish benefits in order to participate in the least destructive way for the purpose of improving society.
Convenience zombies who just grab whatever they want may choose poorly, or not. But it’s worse than a coin toss whether the outcome is detrimental because the most harmful suppliers have the advantage of not being burdened by ethics. Scrapping ethics enables them to offer the most value for the money and undercut the more ethical choices. So if you simply neglect ethics in your consumer decision, you are only looking at value for the money and statistically expected to choose a more socially detrimental option.
It harms everyone because the lesser of evils gets driven out and the worst suppliers prevail. The US saw this with printers when Oki pulled out of the US marketplace. Now the least detrimental option tends to be Brother, which still exposes people to shenanigans. We lost the most ethical option while HP dominates.